波纹板填料的流体力学性能

Study on hydrodynamic performance of corrugated plate packing

应用商用Fluent软件,采用RNG k-湍流模型,对波纹板填料内三维气相流场进行了数值模拟研究。结果发现,气体从填料底部进入后,大部分气体流入波纹板波谷,并沿波纹板倾角方向流动,此时气体流速较大,压降较小;小部分气体在波纹板波锋区域流动,方向曲折向上,气体流速较小,压降也较大;不同气体动能因子下填料的干板压降模拟值与Billet模型预测值、文献实验数据吻合较好;在理想波纹板填料模型中,气体沿波纹板倾角方向流动碰到塔壁时,转向相邻板片波纹倾角的方向流动,实际应用中容易出现壁流现象。本研究对波纹板填料结构改型及应用具有重要指导意义。

Numerical simulation of three dimensional gas flow field in the corrugated plate packing was investigated using the Fluent software and RNG turbulence model.The results showed that,after the gas enters in the bottom of packing,most of the gas went through wave of the plate,with higher gas velocity and lower pressure drop;while only a small part of gas entered in the peak wave of corrugated plate,and then flow tortuously towards the outlet,with smaller velocity and higher pressure drop.The simulation value of dry plate pressure drop agreed well with the Billet model prediction and experiment data in different gas kinetic energy factors.For the ideal corrugated plate packing model,when the gas arrived to the tower wall,it would change direction to flow along the corrugated inclination of the adjacent plate;however,this type of packing would appear wall flow phenomenon in practical application.Research in this paper could be used in guiding the construction,modification and application of corrugated plate packing.